Bending brake



Maur- 13, 1923. 1,448,130

NQKRUMP BENINGBRAKE Filed Dec. 12, 1921 I N V EN TOR.

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TTORNEY Patented Mar. 13, y1923.

UNITED STATES NIC KRUMP, OF CHICAGO, ILLINOIS.

BENDING BRAKE.

Application eld December 12, 1921. Serial No. 521,750.

T0 all whom it may concern Be it known that I, Nro KRUMr, a citizen of the. United States, and a resident. of Chicago, in the county of Cook and State of Illi nois, have invented certain new and useful Improvements in Bending Brakes, of which the following, reference being had to the drawing accompanying and forming a part hereof, is a specification.

Thisy invention relates to bending brakes designed to be used in bending sheet metal of considerable thickness.

Among the objects 0f this invention are to obtain a bending leaf of great rigidity, of economicall construction, and not liable to break or get out of order, and by means of which a straight bend may be obtained.

In the drawing referred to Fig. l is a front elevation of a bending brake provided with a bending leaf embodying this invention, and Fig. 2 is a vertical section on line 2 2 of Fig. 1, viewed as indicated by arrows.

A reference character applied to designate a given part indicates said part throughout the several figures of the drawing wherever the same appeals.

A represents the upper jaw of the brake, and is illustrated in Fig. 2 as comprising niemlvers n.. a', joined' by bolts B, B, and provided with. the lower, and bending,y edge a. C represents the lower jaw of the brake.

and between jaws A and C sheet metal, as Fig. 2, is rigidly. held. as the same is bent.

by the turning o-f the bending leaf E clock-` wise. F, F. are the pivots or fulcrums on which leaf E turns in the operation of the brake. f, Fig. l, represent weighted levers by means of which the bending leaf is turnable on fulcruins F, F, to approach the upper jaw A.

In the operation of this bending brake a sheet of metal (X, Fig. 2), being placed between the upper jaw A and the lower jaw C, and held rigidly in position by the clamp ing of said upper j aw down thereonto, and the bending leaf'E being turned clockwise on fulcrums F, F, the upper edge, (e) of of said bending leaf is forced against the under `sfide of said metal (X), bending said sheet of metal around the edge a of said upper jaw. To prevent said upper edge, c', of said bending leaf E being forced from a straight line, by the bending of said leaf either laterally or longitudinally, I have devised and used the constructions illustrated in Fig. 2.

In the construction illustrated in Fig. 2, the angle irons G, G, are attached'to the bending leaf E by bolts g, g, and the U- shaped iron H is secured to said angle ironsl by bolts it, 7a l I find, when the bending leaf is reinforced in the way illustrated and described,

the upper edge thereof, when forced against a sheet of metal held between the jaws of the brake, will remain straight, that is, will not be deflected in any way.

I claim:

In a bending brake [novided with anupper and a lower aw, the combination therewith of a bending leaf fulcrumed to turn. around the lower edge of said upper.

NIC KRUMP. 

